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- W2073772681 abstract "We consider linear systems arising from the use of the finite element method for solving scalar linear elliptic problems. Our main result is that these linear systems, which are symmetric and positive semidefinite, are well approximated by symmetric diagonally dominant matrices. Our framework for defining matrix approximation is support theory. Significant graph theoretic work has already been developed in the support framework for preconditioners in the diagonally dominant case, and, in particular, it is known that such systems can be solved with iterative methods in nearly linear time. Thus, our approximation result implies that these graph theoretic techniques can also solve a class of finite element problems in nearly linear time. We show that the support number bounds, which control the number of iterations in the preconditioned iterative solver, depend on mesh quality measures but not on the problem size or shape of the domain." @default.
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- W2073772681 date "2008-01-01" @default.
- W2073772681 modified "2023-09-25" @default.
- W2073772681 title "Solving Elliptic Finite Element Systems in Near-Linear Time with Support Preconditioners" @default.
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- W2073772681 doi "https://doi.org/10.1137/040611781" @default.
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